Scuba diving was created by Jacques Cousteau who invented the Self Contained Underwater Breathing Apparatus, which includes the air tanks, regulators, hoses and mask needed for effortless breathing under the water. Scuba diving is a great sport for seeing the undersea nature. When you have your PADI (Professional Association of Diving
Instructors), TDI (Technical Diving International), or NAUI (National Association of Underwater Instructors) scuba diving certification, you can dive almost anywhere in the world.
Scuba diving involves not just the cost of the equipment, but also travel to good & often execotic scuba locations. The equipment for scuba diving is life-critical and always top quality, though you can rent it (especially if you don't dive a lot) at almost any resort or dive shop when you have a recognized certification.
Typical diving gear includes: a mask, a snorkel, a full length wet suit, a hood, a pair of diving gloves, a weight belt, a BCD (Buoyancy Control Device), a primary regulator with an alternate air source (second stage), an air tank, instrument console, diving boots, flippers, a diving knife, dive tables, a slate and an equipment bag for carrying the gear. The equipment is not cheap to buy, with a BCD costing $300-$800y.
Equipment and lessons are available at one of the scuba diving shops here. Try on every piece of equipment before buying. Those with a pool on location, will even let you try it underwater to make sure it functions and fits properly. If you choose to buy used equipment, check it thoroughly, have it inspected by a professional scuba diving equipment technician and ask to test it out (remember, its your life support underwater).
Charlottetown is an intersting place to dive, with a number of lakes not far from the city. The sandy shores, the tidal rivers and bays, variable currents and tides make for very intersting diving conditions around the Island. PEI's location in the Gulf of St Lawrence has been the location of many shipwrecks over the years. There are scuba shops that can rent equipment to you in Charlottetown, Covehead Harbour, and Hazelbrook.